# bpf: Zero queue and stack outputs on lock failure

CVE record · `CVE-2026-92520`

- **Identifiers:** `CVE-2026-92520`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:10 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `e388671635acf470f0986d874389148fd234620b to before 6468e8ac026b44ae2a78114b80f9d1b9164d0f6c` (git)
  - affected: `a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8 to before a6090eeb289c5fa45f7b629befac2bd3c19a6dae` (git)
  - affected: `a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8 to before 23b4bcc79bab5285275912b94e98c286f281de75` (git)
  - affected: `a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8 to before 1534c4bff3aaca19c4c9a82f93e9b81f7c983de3` (git)
  - affected: `a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8 to before e2396b8a562073787e627a5f483f1bc5c452fa6a` (git)
  - affected: `a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8 to before 7ac6e1ae41a09f1dd4baeeff1d028ae49ee01232` (git)
  - affected: `40e34ea01748e5b8afdd40a172868be1e1ab0ede` (git)
  - affected: `388c9d3eefaea99828ee5000c693128a5b41ee7c` (git)
  - affected: `acabf5df49aa3a4f9c96200102d893351b511a88` (git)
  - affected: `232f0ba4d69263af5912e279fcc32fef2882b1dc` (git)
  - affected: `6.1.56 to before 6.1.191` (semver)
  - affected: `5.4.258 to before 5.5` (semver)
  - and 3 more
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.6`
  - unaffected: `before 6.6` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.114 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.52 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.6 to 7.2.*, inclusive` (semver)
  - unaffected: `7.3 to *, inclusive` (original_commit_for_fix)
  - Other versions: affected

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> In the Linux kernel from 6.6, the BPF queue and stack pop and peek helpers return -EBUSY on a failed lock without clearing their output buffer. A BPF program calling these helpers can read uninitialized stack contents. Upgrade to 6.1.191, 6.6.160, 6.12.114, 6.18.52, or a later release in those series.

Written 12 Nov 2026.

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.0018, the 7th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 17 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-92520](https://www.cve.org/CVERecord?id=CVE-2026-92520)
- [NVD: CVE-2026-92520](https://nvd.nist.gov/vuln/detail/CVE-2026-92520)

### References from the CNA

- <https://git.kernel.org/stable/c/6468e8ac026b44ae2a78114b80f9d1b9164d0f6c>
- <https://git.kernel.org/stable/c/a6090eeb289c5fa45f7b629befac2bd3c19a6dae>
- <https://git.kernel.org/stable/c/23b4bcc79bab5285275912b94e98c286f281de75>
- <https://git.kernel.org/stable/c/1534c4bff3aaca19c4c9a82f93e9b81f7c983de3>
- <https://git.kernel.org/stable/c/e2396b8a562073787e627a5f483f1bc5c452fa6a>
- <https://git.kernel.org/stable/c/7ac6e1ae41a09f1dd4baeeff1d028ae49ee01232>

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-92520>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

---

The web page: <https://agentprime.io/advisories/CVE-2026-92520/>. Everything for agents: <https://agentprime.io/llms.txt>.